<template>
  <div>
    <!-- 商品分类导航 -->
    <div class="type-nav">
      <div class="container" @mouseenter="currShow" @mouseleave="currNotShow">
        <h2 class="all">全部商品分类</h2>
        <nav class="nav">
          <a href="###">服装城</a>
          <a href="###">美妆馆</a>
          <a href="###">尚品汇超市</a>
          <a href="###">全球购</a>
          <a href="###">闪购</a>
          <a href="###">团购</a>
          <a href="###">有趣</a>
          <a href="###">秒杀</a>
        </nav>
        <div class="sort" v-show="show">
          <div class="all-sort-list2" @click="goSearch">
            <div @mouseleave="deleteBackColor" @mouseenter="addBackColor(index)" class="item"
                 v-for="(c1,index) in navList" :key="c1.categoryId"
                 :class="{cur:index===currentIndex}">
              <h3>
                <a :data-categoryName="c1.categoryName" :data-categoryId="c1.categoryId">{{ c1.categoryName }}</a>
              </h3>
              <div class="item-list clearfix">
                <div class="subitem" v-for="c2 in c1.categoryChild" :key="c2.categoryId">
                  <dl class="fore">
                    <dt>
                      <a :data-categoryName="c2.categoryName" :data-categoryId="c2.categoryId">{{ c2.categoryName }}</a>
                    </dt>
                    <dd>
                      <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                        <a :data-categoryName="c3.categoryName" :data-categoryId="c3.categoryId">{{
                            c3.categoryName
                          }}</a>
                      </em>
                    </dd>
                  </dl>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {mapState} from 'vuex'

export default {
  name: "NavVue",
  data() {
    // 这里存放数据
    return {
      currentIndex: -1,
      show: true
    }
  },
  // import 引入的组件需要注入到对象中才能使用
  components: {},
  props: [],
  // 方法集合
  methods: {
    addBackColor(index) {
      this.currentIndex = index

    }, deleteBackColor() {
      this.currentIndex = -1
    }, goSearch(event) {
      let {categoryname, categoryid} = event.target.dataset;
      if (categoryname && categoryid) {
        let params = {name: 'search', query: {categoryName: categoryname, category1Id: categoryid}}
        if (this.$route.params) {
          params.params = this.$route.params
        }
        this.$router.push(params)
      }
    }, currShow() {
      this.show = true
    }, currNotShow() {
      if (this.$route.name === 'search') {
        this.show = false
      }
      if (this.$route.name === 'detail') {
        this.show = false
      }
    }
  },
  // 计算属性 类似于 data 概念
  computed: {
    // ...mapState('Home',['navList']),
    //  ...mapState('Home',{navList:'navList'})
    ...mapState({'navList': state => state.Home.navList})
  },
  // 监控 data 中的数据变化
  watch: {},
  //过滤器
  filters: {},
  mounted() {
    if (this.$route.name === 'search') {
      this.show = false
    }
    if (this.$route.name === 'detail') {
      this.show = false
    }

  }
}
</script>

<style scoped lang="less">
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      position: absolute;
      background: #fafafa;
      z-index: 999;

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;

            a {
              color: #333;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &:hover {
            .item-list {
              display: block;
            }
          }
        }
      }
    }
  }
}

.cur {
  background-color: #1e6bda;
}
</style>
